Folder h5p/temp gets big

Hello, on my server the sites/default/files/h5p/temp has about 37GB. It seems like data gets exported there, if i edit an activity. Can i somehow smaller the amount of used data here? I found out, the server dumps to .../h5p/temp/ allwas 2GB, if i edit a special training (/18). Then the site runs into a server timeout. If i click on all other trainings, no data is dumped and the training gets displayed immediately.