Rendering error in liquid domain

Hello together,

I tried to make some glass letter with a liquid fill. The liquid Domain bake, runs well, but in render view of 2 of the 18 frames shows the following error.
The liquid domain is render only half. One picture later the full domain is render again.
I can not avoid this.

Please take a look at Frame 214 and 216. All other frames are correctly rendered.

Can help someone

Liquid Domain problem.pdf (1.28 MB)Liquid Domain problem.pdf (1.28 MB)