tag is broken When export a .srt

[Former user]

import srt file:

1 00:00:00,000 --> 00:00:10,000 <b><font color="#ff0000">text</font></b>

2 00:00:20,000 --> 00:00:30,000 <b>text1<font color="#ff0000">text2</font></b>

export set file:

1 00:00:00,000 --> 00:00:10,000 <font color="#ff0000"><b>text</b></font>

2 00:00:20,000 --> 00:00:30,000 <b>text1<font color="#ff0000">text2</b></font>

Line 1: Tag is inverted. Line 2: Nesting error.