SDK: DA1468x_DA15xxx_SDK_1.0.12.1078

I am attempting to debug some code on a DA14683, however, when I have a JTAG debugger attached and attempt to step through the code, it's waiting for the PLL to lock. After a varying amount of time (few mins up to 40+ mins) the code continues. When I don't have a debugger attached the software runs as expected.

Additionally, if I let the board start up and then attach a debugger, it's okay.

Is this a known issue? Have I made an error somewhere setting up the debugger/initialising the system clock? This could be a hardware issue, however, I thought it would be worth posting on here in case anyone else has encountered this issue and I have made a mistake somewhere.

Thank you.