Slurs in Tabs with stems should be note head side rather than stem side.
Currently, in a Tab staff with stems (common and full types), and with the input of two voices, the slurs are associated with these stems. This leads to such difficulties: #70906: REGRESSION: Slurs in tab staff with stems are badly centered
And, I guess, to other bugs or unexpected results, like here: #60736: Combination of beams and slurs works badly with two voices in Tab staff common
This point was discussed in comment # 25 and followings, here: #69846: Ties and slurs have a mirror effect by entering two voices in Tab/standard linked staves
After thinking about this, and especially found examples of published scores, I have come to believe that it is a mistake to place these slurs "stem side". It should be "note head side" (ie numbers/letters for the Tabs)
An example for now: