I’m using Roku streaming sticks (3400X & 3500X) which are probably the Roku devices with the lowest amount of processing power, and rarely get the “Loading Please Wait” issue on my TVs.
There were a couple of things I did when experiencing problems early on with Tablo. Initially, Tablo was connected to my router wirelessly, and the Rokus had major problems connecting to it. Moving the Tablo next to my router and connecting via Ethernet cable solved that issue for me.
Initially, my amplified antenna signal was coming in to a splitter, and from the splitter went to each of my 4 TV sets, and the Tablo. Because the Tablo has an internal 4 way splitter, the loss was just too much to get decent reception on all channels I wanted, so I ditched my external splitter and ran the amplified antenna signal directly to the Tablo. Weak signal at the input to the Tablo can result in missing some of the weaker channels and also can cause LPW issues.
After doing all this, I still had some issues. Now, even tho I thought I had a pretty decent router (good enough for web browsing, emails, and even streaming Netflix and Hulu among other OTT services) it just wasn’t good enough for the demands imposed on it by the Tablo, at the quality settings I wanted to use. I could have degraded video quality by going with a lower bit rate setting and tried that, but instead, I upgraded my router to a TP Link Archer C7 and virtually all my issues went away to the point that Tablo is very stable and I view it as a highly reliable appliance.
One other thing… there were sereval versions of “bad” software that I went through, for the Tablo as well as the Roku software. At one point, Roku software was so bad that I bought a Nexus Player just to be able to watch live and recorded content on the Tablo. The Roku software has since been fixed, and the Tablo software as well, not to mention the Roku Tablo channel. So make sure all the software is up to date.
Unfortunately, every situation is unique. Antenna selection and positioning is important, and I suspect many folks go through several before they get something they’re happy with. Your home network is also crucial in getting Tablo to function properly. Some folks have had success, where possible, in connecting their Roku to the router via Ethernet… and if it wasn’t in the same room as the Tablo, using Ethernet powerline adapters.
Anyway, I hope you find some of my experience useful in working through your issues. I’m really happy with my setup now.