When im using my house's wifi i have black screen, but when im using diffirent wifi i can play mcpe

When im using my house's wifi i have black screen, but when im using diffirent wifi i can play mcpe. I can turn on mcpe in my house but i need ram usage 600 mb + and i need to make this combination: turn on mcpe . turn on mcpe with clean master speed booost thing and i need to make 1 time more but when i turn on mcpe with clean master speed boost thing i nedd to wait 10 seconds P.S My phone is Samsung Galaxy Grand Prime one sim version LTE buyed in Polish Orange P.S2. Sorry for my Bad english im from poland