One question about midi effect .


How many effects of the same type can be in a midi track? Is there a limit?
For example, I create one midi track, in midi effects section, in first slot, select atom pianoroll plugin, and in second slot,again atom pianoroll . Both of these Atoms work well and hear their voice properly. But if i select 2 fuge machine for one midi track ,I always hear the sound of one of them , While both are active and apparently working . There is this problem for rrc2softs bouncy and rc2softs Gravity. Or 2 same Audio veeks . Does this problem is cubasis bug or some plugins bug ?

Ipad air 2
Ios 12,1,1
Cubasis 2,8,1