VU+ Solo SE V2 Memory leak

I have this problem with memory leak. It happens when I watch movies which was recorded and stored in Kingston Data Traveler 3.0 USB stick (128 GB). Normal usage of Ram memory is 19% i.e. 133MB. After I watch recorded movie from USB stick the memory usage jumps to 98% !! and only way to free it, is to do full restart. I delete Movie player addon but the problem is very persistent. Anybody have any idea what is the reason for this ?

Any help will be highly appreciated.

By the way, I'm using latest addition of OpenPli 4.

Thanks

Phill