Ue 4.26 Water plugin caustics has no any moving anyway

Hi. I am using since yesterday water plugin. Its amazing, thanks for this plugin.
So, i am using WaterBodyCustom but when i activate Caustics there are no any move in the water. Yes, caustics are shown but its stable.
When i am check the “Use SubUV Animation” than caustics are movable but the moves incradible fickring like crazy.

Thanks for answers.