If a reliable narrator, whose hearing from a Companion has been established, frequently narrates from him via ananah (i.e., saying "on the authority of") without explicitly stating "he narrated to us," would such a narration be considered mursal (i.e., with a missing link in the chain) and thus flawed due to the irsal (sending) and discontinuity?

"Abu Al-Jawza' Aws bin Abdullah Al-Rab'i is trustworthy, but he frequently transmits Mursal (disconnected) narrations. He has not been described as a 'Mudallis' (one who practices tadlis - a type of concealment in narration). The rule of narration is that the narration of a non-Mudallis from someone he heard from or was contemporary with, even if it is transmitted with 'an'anah (using 'on the authority of'), is considered to be heard. His narration from Abdullah bin Amr with 'an'anah is considered heard as long as he is not a Mudallis. However, his narration from someone he was not contemporary with is considered Mursal."