AcroPDFImpl.dll faulting module

So we have a powerbuilder application which is having issues with viewing/opening pdfs using this dll. It uses a Microsoft Web Browser oleobject in order to open, view and save pdfs. When we update to 2018 some environments are having issues and the crash reports are indicating acro is the faulting module. The crash for me was happening when I attempt to close the window which is supposed to show the pdf (instead i just see a grey background). If I let the window idle (for about 3 mins) instead of closing it i will get a message stating "There is a problem with Adobe Acrobat/Reader. If it is running, please exit and try again.(103:103)".

Disabling the setting for protected mode in adobe does prevent the issue. Is there any other better/permanent solutions to try? (other than reverting to XI)

Faulting application name: PB120.EXE, version: 12.0.0.5530, time stamp: 0x4bb82661

Faulting module name: AcroPDFImpl.dll_unloaded, version: 18.11.20040.19174, time stamp: 0x5af4c493

Exception code: 0xc0000005

Fault offset: 0x00037e45

Faulting process id: 0x2550

Faulting application start time: 0x01d40fac03e000a5

Faulting application path: C:\Program Files (x86)\Sybase\PowerBuilder 12.0\PB120.EXE

Faulting module path: AcroPDFImpl.dll

Report Id: 06cdfecd-8c7e-4a62-9e41-dd92a1fa71e2

Faulting package full name:

Faulting package-relative application ID: