[Scummvm-tracker] [ScummVM :: Bugs] #11521: ScummGlk loses scrollback from time to time

[ScummVM :: Bugs]

#11521: ScummGlk loses scrollback from time to time
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Reporter:  dfabulich  |      Owner:  (none)
    Type:  defect     |     Status:  new
Priority:  normal     |  Component:  Engine: GLK: ZCode
Keywords:             |       Game:
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 I don't have a totally reliable repro for this, but every once in a while,
 ScummGlk seems to lose all of its scrollback buffer, typically blanking
 out the screen while I'm playing.

 To repro: (???) Add a ZCode game. Any game, but for example Lost Pig
 https://mirror.ifarchive.org/if-archive/games/zcode/LostPig.z8 (It seems
 to help if you remove and re-add the game to re-repro.) Play the game for
 about two minutes. (Is that when the autosave kicks in, perhaps?)

 Actual: Eventually, the screen will fail to render properly; all of your
 scrollback will be gone, and even the current screenful of text will
 appear only partially rendered.

 Expected: The scrollback should stay on the screen.

 I'm on ScummVM osx_x64-master-cd145a04 on macOS 10.15.5, if that matters.

 I've attached a couple of screenshots of it happening.
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Ticket URL: <https://bugs.scummvm.org/ticket/11521>
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