Bug 401630

SUMMARY
When I import animations to Krita, the playback while using the scrubber is off. 

STEPS TO REPRODUCE
1. Import files (I'm using PNG files) as animation images
2. Set up animation as normal
3. Press play

OBSERVED RESULT
I have three frames right now (blink 1, blink 2, blink 3). They are spaced out over 12 frames, with blink 1 on frame 1, blink 2 on frame 3, and blink 3 from frame 5 onward. The problem is that blink 3 won't play until frame 12, even though it's supposed to play on frame 4. Instead of blink 3, blink 2 would play for frames 3-11. 

This only happens when using the animation tool in Krita. Just to see if it was a display bug or not, I exported the animation as a gif, and the exported gif worked exactly as expected. I'm not sure what is causing this and I don't know how to fix it (sometimes it's okay, sometimes it's not, it's a total mystery). 

EXPECTED RESULT
Frames play in the order and pace that I set them to play. Blink 1 plays on frame 1, blink 2 plays on frame 3, blink 3 plays from frame 5 to frame 12. The animation in Krita should look the same as the exported gif version. 

SOFTWARE/OS VERSIONS
Windows: 
MacOS: 10.13.6 (high sierra) 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION
I'm unsure how this bug is surfacing, it seems to only be around half the time. The rest of the time, it goes away after I put a few more frames into the animation. I'm currently trying to animate this to music, and since the audio player isn't working right now, it's especially crucial that I am able to play the animation in Krita as accurate as possible.