Rich text Merge field - Not using font specified in HTML

I have a rich text merge field in a writer template which is creating a table. I have chosen to use this method instead of a repeat region because I need to specify specific cell background colours which change every time the document is created.

The problem I'm facing is that I need to specify a specific font for one of the columns. That font has been loaded into the template. But the document is ignoring the font specified.

Icon	DMC Number	DMC Name	Quantity
o	151	Dusty Rose Very Light	849
o	152	Shell Pink Medium Li	253
o	160	Grey Blue Medium	255
o	310	Black	469
o	349	Coral Dark	475
o	351	Coral	347
o	453	Shell Grey Light	433
o	553	Violet	284
o	606	Burnt Orange-red	226
o	644	Beige Grey Medium	245
o	728	Golden Yellow	642
o	741	Tangerine Medium	344
o	747	Sky Blue Very Light	381
o	761	Salmon Light	138
o	775	Baby Blue Very Light	417
o	778	Antique Mauve Very Lt	395
o	797	Royal Blue	427
o	799	Delft Blue Medium	190
o	809	Peacock Blue	199
o	817	Coral Red Very Dark	376
o	945	Tawny Medium	322
o	947	Burnt Orange	239
o	954	Nile Green	315
o	959	Sea Green Medium	397
o	961	Dusty Rose Dark	328
o	964	Sea Green Light	755
o	970	Pumpkin Light	347
o	977	Golden Brown Light	624
o	3042	Antique Violet Light	511
o	3046	Yellow Beige Medium	397
o	3341	Apricot	37
o	3354	Dusty Rose Light	582
o	3687	Mauve	271
o	3740	Antique Violet Dark	799
o	3761	Sky Blue Light	547
o	3766	Peacock Blue Light	371
o	3822	Straw Light	417
o	3827	Golden Brown Pale	277
o	3846	Bright Turquoise Light	1101
o	3849	Teal Green Light	255
o	3855	Autumn Gold Light	272
o	3856	Mahogany Ultra Very	195
o	3865	Winter White	1196
o	ECRU	Ecru	1350
o	BLANC	White	70

This is a table based on sample data. For some reason, the icon is showing up here, but in the writer document, it just shows as the letter "o". The symbol will be different for each row when the issue with the font is fixed, but I have just used the 1 character a the icon simply for testing.

How can I go about fixing the issue with Writer not using the correct font specified in the HTML?