Hatsan spark compressor help!

Hatsan flash compressor has worked great till my second refill. Now won’t get pressure past 3k it stalls the motor. Not sure what this is will post photo if it’s a bad burst disk or not? But when I took it out n blocked the hole it seems to run better any help would be great.

2A95B9A1-A225-4A7F-B1BA-748C91ADC416.jpeg