OK, thanks. I edited your post and removed the quotes so it is easier to read.
It sounds like the signal may be OK, but you are having to re-authenticate to the Wi-Fi on your MBP only? If that is the case, it may be a reasonably simple solution.
Try the following:
-Navigate to > System Preferences... > Network > Wi-Fi > Advanced... > Wi-Fi tab
-Click once to highlight your current Wi-Fi network
-Click the minus - button, OK, then Apply
-When it has been deleted, click on the Wi-Fi icon on the right side of the menu bar and select your Wi-Fi network from the list
-Enter your Wi-Fi credentials and check the box to Remember this network, then click Join
-Go back to > System Preferences... > Network > Wi-Fi > Advanced... > Wi-Fi tab, and click and drag that network name to the top of the list, click OK and Apply
See if that resolves the issue and let us know.
C