That with ‘why’ is the crucial question — explained in article here:

The essence of Russian politics — and thus their military efforts — in Syria — is to destroy what Moscow assessed is the biggest threat for…

That with ‘why’ is the crucial question — explained in article here:

Here’s the Key to Understanding the Russian Air Force’s Actions in Syria
The Russian air force is back to bombing hospitals, bakeries, mosques and roads inside areas held by Syrian insurgentswarisboring.com

The essence of Russian politics — and thus their military efforts — in Syria — is to destroy what Moscow assessed is the biggest threat for Assad’s regime: the (proven) ability of Syrian population to organize and run its own authorities, concurrent/parallel to those of Assad.

Reason: Russians see this as evidence that Assad is not only unnecessary, but a major obstacle to peace and stability of Syria (in essence, everybody else should see it the same way, but nobody cares.)

From that standpoint, ‘bombing al-Qaida’ (i.e. ex-JAN, now JFS) is ‘unimportant’ for Russians— especially if this is then connected to ‘supporting the IRGC’ - because Moscow’s second aim is to (as far as possible any more) get Assad out of the grip of Tehran.

Thus, making life impossible - or at least unbearable — for Syrian population within areas held by insurgents (and Jihadists, in some places) was, is and remains a priority. Therefore, they’re bombing hospitals or civilians around Idlib even then when military logic would demand them to bomb insurgents and Jihadists on the frontlines around southern Aleppo.

(Even more so if a bi-product of this campaign is a mass flow of refugees into the EU, which in turn is destablizing the latter.)