Ok, so, two of the 3 TCL TV's my signature, only the 6 series doesn't have it yet andIts not available for it because I tried to do the check manually and it's not available.
Having said that, the 55P did get it and I did the test with both Netflix and VUDU and both worked fine. Netflix said 34.4mbps and VUDU doesn't give a numerical value other than the vertical bar never dropped and it said UHD recommended.
So my wired tv is not affected by the Roku OS update. Neither was my 49S model, about the same speed as the. p.
Did you try powering off/on your wifi router? Give that a try if you haven't. Like I said, I don't use wifi for anything except my phone and tablet. Hopefully someone else who got the OS update can chime in and let you know if they are having issues with streaming after the update.
Good luck and keep us posted.
TCL-65R615, 55P605 DV/HDR10 & 49S405 HDR10, Philips BDP7501, BPD7502 UHD Players
Oppo BDP-105D, 105, 93, Marantz AV7702MKII, NR1607. Xbox One S
Emotiva XPA5,UPA2, UPA200 & Mini X Amps
Speakers, Polk SDA-2, Monitor 10A & 5A, Axiom M80,
VP180, QS8, M2, QS4, ATMOS 7.1.4 & 5.1.2 NYGiants!