1. The problems around the chains definitely indicate that the exposure interval in the bracket is too great. That would be solved most likely by more exposures with smaller step.
2. The glare near the windows could be a result of flare between lens elements. You might want to check if your bracketing is honnoring a single aperture. It also can be solved by shooting more exposures with smaller interval as that allows you to selectively blend the desired images.
3. In my experience, if you have to apply highlight recovery, the bracket might be considered a fail as these types of problems, especially around the chains, will show up. Having said that: it's been a while since doing a true hdr, and I have no experience with that lens.
Another $0.02 down the drain...
My professional specialty is architectural and interiors photography. You will find examples illustrating my capabilities at the website url below. I frequently deal with the sort of technical challenge illustrated in the OP's example. I am conversant with HDR and have used various HDR programs over the years in the course of my work. I use the Canon 17mm ts-e frequently in the course of my work. Therefore, I think it is fair to say that I have some reasonable expertise in this subject, though I hardly claim to know everything about it.
As is typical of LuLa, many of the people commenting in this discussion do not show examples to demonstrate their capabilities or they hide behind pseudonyms, or both, which does not give me much confidence in their credibility.
Based on my experience, neither tonemapping nor the size of the exposure intervals (assuming typical intervals of 1 to 2 stops between exposures) is the cause of the artifact. It will often show up in any automated process for combining varied exposures to subdue an extreme dynamic range when the "blooming" is evident in the majority of the lighter and middle component exposures, though variations in the tonemapping may make the effect more or less evident.
With Lightroom's HDR, I have sometimes been able to subdue this effect with the LR adjustment brush, but this is not a panacea. Another option sometimes is to retouch in Photoshop. However, the techniques I most often use to deal with this technical challenge involve using supplementary lighting, with or without HDR (mostly without).