I believe that the point of the verse is not to point out that Abraham lived together with Isaac and Jacob (although they did seem to do so at one point), but rather to remind the reader that all three generations lived as nomads in the land of promise during the course of their lives.
The word translated here as "tabernacle" is σκηνή - skēnē - which really means a "tent" or "temporary dwelling". It is the word, for example, in the Septuagint version of Adah bare Jabal: he was the father of such as dwell in tents (Genesis 4:20).
The point that the Church Fathers saw in this verse was that not only Abraham consented to live nomadically, but his progreny also. John Chrysostom comments:
And what marvel, if he himself [were so], when his seed also dwelt in
this same way? For seeing the promise disproved (since He had said,
“To thee will I give this land, and to thy seed” — Gen. 12:7; Gen.
13:15), he saw his son dwelling there; and again his grandson saw
himself dwelling in a land not his own; yet was he nowise troubled.
Homily on Hebrews XXIII