I don't think it's a COVID-19-related issue, with regards to CJPP... it's been a chronic issue for years. I've ordered several things from them that have fallen into the 'back-order black hole,' and had some Hell of my own getting out of that situation.
Also, I'm not sure we can really lump everybody into the same big box of 'customer service sucks because of C-19.' I recently blew my wife's stimulus check on a new hot-rod gaming computer for her (components, not an assembled system), and everything arrived within days from Newegg.com.
As well, I screwed up the paint on the backside full-metal panel (painted the mural 90-degrees out of alignment), so I contacted the case manufacturer (Fractal Design) and asked to purchase a replacement panel - they said they couldn't sell me one because they're not set-up for direct retail, but would send a new one as long as I paid for shipping. They didn't have to do that, but they did and aside from the awesomeness of their products, they are now by far my favorite computer case manufacturer.
The supply chain has indeed taken a massive hit thanks to this... pandemic, as has just about every other aspect of our lives. But I'm still of the opinion that there's a lot more 'self-inflicted grief brought on by our government and main stream media' by politically weaponizing these latest world events... just as they always do for the purposes of making the other side look bad when their agendas are threatened (I'm not picking sides, either - they all do it). The problem is that We The People do all the suffering when these things happen. I don't know how to do it, but it's gotta stop.
All the while, OMS, NPD, Newegg, Fractal Design, Amazon, Wal-Mart, et al, continue to do their best (which ain't all that bad, all things considered) while CJPP continues to disappoint.