broken tiles after panning (+500px) & zooming (4+ levels at once)

update 25.2.2017: generic jsfiddle to reproduce this issue: https://jsfiddle.net/no56t0fh/2/

We encountered a strange behaviour when implementing Google Mutant for our upcoming release. Have a look at the fullscreen map at https://dev.mapsmarker.com/pro/maps/fullscreen/layer/561/ - default map is OpenStreetmap which works without issues:

Anyway if you switch to a Google Mutant layer afterwards, the tiles are not fully displayed:

To fix this, you have to pan the map several times for all tiles to be loaded correctly.

We couldnt find out yet what exactly is causing this behaviour & would appreciate any help in fixing this issue, which we believe is a general GoogleMutant issue.