img tags not converted correctly

[benwallis]

HTML:

<img src="https://example.com/wp-content/uploads/hm_bbpui/2865/plub7heiy33ebpi5y737xjmc1nowha6i.jpg" alt="">
<img src="https://example.com/wp-content/uploads/hm_bbpui/2865/gxovanwebx6g7472f4o1rjr3ljujrvvl.jpg" alt="" />

Result:

[img]https://example.com/wp-content/uploads/hm_bbpui/2865/plub7heiy33ebpi5y737xjmc1nowha6i.jpg" alt="[/img]
<img src="https://example.com/wp-content/uploads/hm_bbpui/2865/gxovanwebx6g7472f4o1rjr3ljujrvvl.jpg" alt="" />