On the other hand, as you posted above, your Aurender N10 is dropping the Tidal signal AFTER you completed the latest Aurender software upgrade. AND, in addition, is working fine for your various other streaming service.
I cannot understand why my Aurender N10 is working and your is not. Your also stated above that "you have contacted Aurender support and they admitted the issue". If Aurender has a software issue, you would think it would apply to everyone and not just a few. I find it hard to believe that our N10's servers have different hardware but I guess anything is possible.
I suggest you send Aurender another follow up email to support@aurender.com. Please describe your issue, again (sorry), and reference the fact that "they admitted the issue". Please ask them if they are working on the issue and when they expect to release an software update. Please also state in your email that "you have no issues with other streaming services like youtube, Apple TV that require higher bandwidth". I also send them an email referencing your issues several days ago.
Since you are having have no issues with other streaming services like youtube, Apple, this confirms, for me, that your ISP environment is okay. You also mentioned your Aurender worked fine BEFORE the software upgrade. I do not know, but I wonder if the Aurender software upgrade was installed correctly by the Aurender process (that was not under your control). You might mentioned this in your email to Aurender.
I have no further information on this issue and have no clue why you are having these drop out issues. Please keep me posted and, if needed, I will email Aurender Support requesting their help. We need to get this issue solved.
If anyone else on Audiogon, has any additional suggestions, or comments, please post them. Thanks..