UAD DSP Memory Overloaded

I use UAD Apollo 8 thunderbolt card to listen to music.
For example, I use 2 UAD plugins in Audio Unit section.
When I start playing first song in playlist I see, that UAD uses 2 plugins. It’s OK.
Then when second song was playing I noticed that UAD card used 4 plugins. Then 6, 8, 10,… plugins with each song. After several times I got the message about using 100% DSP memory. Who knows what is it?
Please, help me.
UAD plugin version 9.10.1 08-16-2019 build 65168
Audirvana version 3.5.20 (3550)

No idea, but i have the same problem on my Apollo Twin MK1.