My PROGRAF-1000 is disconnecting from my network after every print job adn will not reconnect unless

[claremax]

I have anew PRO-GRAF1000, purchased in July. It is running through Bluetooth to my iMac operating Processor - 3.1 GHz 6-Core Intel Core i5 Sonoma 14 6.1

For the past week I have been printing large files of 64 sheets per file at a time. As of this morning, My printer will disconnect if a file is larger that 20. 

What is the problem?