# 66339 - Canvas paints twice on Open when inside a TabPanel on mac

**URL:** <https://forum.xojo.com/t/66339-canvas-paints-twice-on-open-when-inside-a-tabpanel-on-mac/66386>\
**Category:** Bugs and Feature Requests\
**Created:** [November 1, 2021, 3:59pm UTC](https://forum.xojo.com/t/66339-canvas-paints-twice-on-open-when-inside-a-tabpanel-on-mac/66386 "2021-11-01T15:59:42Z")\
**Posts on this page:** 10\
**Page:** 1

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**Author:** ![anon20074439](https://forum.xojo.com/letter_avatar_proxy/v4/letter/a/ac8455/32.png) [@anon20074439](https://forum.xojo.com/u/anon20074439)\
**Post date:** [November 1, 2021, 3:59pm UTC](https://forum.xojo.com/t/66339-canvas-paints-twice-on-open-when-inside-a-tabpanel-on-mac/66386/1 "2021-11-01T15:59:42Z")

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Feedback Case Number: \<[https://xojo.com/issue/66339](https://xojo.com/issue/66339)\>

Could someone try the attached example project with 2021r2.1 in High Sierra on bare metal (not a VM) and let me know here if you see two paints reported in the message pane of the IDE? The reason being, I’m able to reproduce it.

Thanks

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**Author:** ![Tim\_Parnell](https://forum.xojo.com/user_avatar/forum.xojo.com/tim_parnell/32/161_2.png) [@Tim\_Parnell](https://forum.xojo.com/u/Tim_Parnell)\
**Post date:** [November 1, 2021, 4:17pm UTC](https://forum.xojo.com/t/66339-canvas-paints-twice-on-open-when-inside-a-tabpanel-on-mac/66386/2 "2021-11-01T16:17:44Z")

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Or as suggested by the staff member - if anyone can - check with the unreleased R3.

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**Author:** ![Beatrix\_Willius](https://forum.xojo.com/user_avatar/forum.xojo.com/beatrix_willius/32/282_2.png) [@Beatrix\_Willius](https://forum.xojo.com/u/Beatrix_Willius)\
**Post date:** [November 2, 2021, 6:16am UTC](https://forum.xojo.com/t/66339-canvas-paints-twice-on-open-when-inside-a-tabpanel-on-mac/66386/3 "2021-11-02T06:16:51Z")

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Is this good or bad (High Sierra, latest something):

![Screen Shot 2021-11-02 at 07.16.14](https://forum.xojo.com/uploads/default/original/2X/a/ab7e63fab37f5bc88e6b8b97deb4722c61f05b46.png)

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**Author:** ![anon20074439](https://forum.xojo.com/letter_avatar_proxy/v4/letter/a/ac8455/32.png) [@anon20074439](https://forum.xojo.com/u/anon20074439)\
**Post date:** [November 2, 2021, 6:18am UTC](https://forum.xojo.com/t/66339-canvas-paints-twice-on-open-when-inside-a-tabpanel-on-mac/66386/4 "2021-11-02T06:18:47Z")

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Thanks Beatrix, is that just running the project without resizing/moving the window or was the last two from switching tabs?

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**Author:** ![Beatrix\_Willius](https://forum.xojo.com/user_avatar/forum.xojo.com/beatrix_willius/32/282_2.png) [@Beatrix\_Willius](https://forum.xojo.com/u/Beatrix_Willius)\
**Post date:** [November 2, 2021, 6:27am UTC](https://forum.xojo.com/t/66339-canvas-paints-twice-on-open-when-inside-a-tabpanel-on-mac/66386/5 "2021-11-02T06:27:30Z")

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The Feedback said: run project, check message pane. That’s what I did. No click whatsoever - no window resize or move.

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**Author:** ![anon20074439](https://forum.xojo.com/letter_avatar_proxy/v4/letter/a/ac8455/32.png) [@anon20074439](https://forum.xojo.com/u/anon20074439)\
**Post date:** [November 2, 2021, 6:28am UTC](https://forum.xojo.com/t/66339-canvas-paints-twice-on-open-when-inside-a-tabpanel-on-mac/66386/6 "2021-11-02T06:28:08Z")

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Then that’s perfect for reproduction, many thanks.

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**Author:** ![anon20074439](https://forum.xojo.com/letter_avatar_proxy/v4/letter/a/ac8455/32.png) [@anon20074439](https://forum.xojo.com/u/anon20074439)\
**Post date:** [November 2, 2021, 6:29am UTC](https://forum.xojo.com/t/66339-canvas-paints-twice-on-open-when-inside-a-tabpanel-on-mac/66386/7 "2021-11-02T06:29:19Z")

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Sorry one last question, was that 2021r2.1 or r3 ? If it was 2021r2.1, could you test it in r3 for me? Thanks!

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**Author:** ![Beatrix\_Willius](https://forum.xojo.com/user_avatar/forum.xojo.com/beatrix_willius/32/282_2.png) [@Beatrix\_Willius](https://forum.xojo.com/u/Beatrix_Willius)\
**Post date:** [November 2, 2021, 6:36am UTC](https://forum.xojo.com/t/66339-canvas-paints-twice-on-open-when-inside-a-tabpanel-on-mac/66386/8 "2021-11-02T06:36:27Z")

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Tested with version:

> [@Beatrix\_Willius](#):
>
> latest something

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<div class="post-metadata">

**Author:** ![anon20074439](https://forum.xojo.com/letter_avatar_proxy/v4/letter/a/ac8455/32.png) [@anon20074439](https://forum.xojo.com/u/anon20074439)\
**Post date:** [November 2, 2021, 6:38am UTC](https://forum.xojo.com/t/66339-canvas-paints-twice-on-open-when-inside-a-tabpanel-on-mac/66386/9 "2021-11-02T06:38:22Z")

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Ohhhhh right _taps nose_ gotcha, thanks 😃

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**Author:** ![anon20074439](https://forum.xojo.com/letter_avatar_proxy/v4/letter/a/ac8455/32.png) [@anon20074439](https://forum.xojo.com/u/anon20074439)\
**Post date:** [November 2, 2021, 6:40am UTC](https://forum.xojo.com/t/66339-canvas-paints-twice-on-open-when-inside-a-tabpanel-on-mac/66386/10 "2021-11-02T06:40:21Z")

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@Robin_Lauryssen-Mitchell, could you reopen \<[https://xojo.com/issue/66339](https://xojo.com/issue/66339)\> please, it seems like its still reproducible in High Sierra.