That's good to know. At least worth testing before investing another $15. 
These days many motherboards have solution for USB voltage drops (advertised under different names).
In case of ASRock - B450 Steel Legend, power is supplied from MB 12V power plane and stepped down to 5V, to ensure stable USB voltage without dips.
On ASRock - B450 Steel Legend, this is implemented on 4 rear USB 3.1 gen 1 (formerly USB 3.0) ports. ASRock calls it "Ultra USB Power".
So, no real need for powered USB hub...
Just to add on here, you could also make use of the often overlooked and under utilized spare USB 2.x INTERNAL USB headers (usually 2 of these) that are still offered on many mobos even today to run USB HOTAS controllers off of. All that would be required is the addition of a 3 or 4 port USB 2.x rear case adapter (these can still be found on some online sites, like Newegg, for about the same amount of money or less than a cheap powered USB hub) to power\run the controllers off the mobo (thus PSU) power which is usually fairly stable (have their own mobo tracing routes to chipset) and more than adequate for most any set of std USB HOTAS controllers as most still use the USB 1.x\2.x specs.
This is how I have my CH USB HOTAS setup currently attached to my box shown in sig below. Works just fine so no need of a powered hub.
The main difference today is the use of VR headsets\controllers which most require min of USB 3.x specs but many mobo's also provide internal USB 3.x headers as well that also go unused on a fair number of systems (unless being used for front case USB access, which could also be the same for at least 1 of the internal USB 2.x headers).
You could also use a 3 or 4 slot USB to PCI-E add in card mounted in a spare PCI-E slot (min 1x slot) on the mobo to do the same....for approx. the same $15 cost of a powered USB hub. I have also gone this route as well prior to my current configuration (used an Orico 7-port USB to PCI-E add in card....card worked fine, the issue was the ports were arrainged on card perpendicular to the rear case slot so the problem of grounding was apparent if the rear case slot was not wide enough to effectively clear the USB plug). This was the only reason why I stopped using it.....I then remembered that I had 1 of these 4 port internal USB 2.x rear case adapters spare in my spare\used computer parts bin.....popped it in and been happy since.
I only bring this up as these options are often overlooked nowadays but are still available on many of the latest mobos to date. Some of us old timers that have been building boxes for some time even may already have 1 or more of these internal USB rear case adapters spare as these were more commonly supplied w\ mobos back in the day to provide additional USB port access but not so much these days.
Hope this helps.
