HP Glitching in GWD/Possible DH problem

Code:

[09:47:06] <%Gwi[XD]> ** (Gwd) Neopets takes out his Dharoks axe and hits a 14 on Zaros [HP] ..........358...........
[09:47:06] <%Gwi[XD]> ** (Gwd) Neopets's Unicorn uses their ability to heal a 14 [HP] ..........95...........
[09:47:06] <%Gwi[XD]> ** (Gwd) Zaros unleashes his rage and hits a 13 on Dragon` [HP] ..........86...........

[color=red][09:47:11] <%Gwi[XD]> ** (Gwd) Dragon` takes out his Dharoks axe and hits a  on Zaros [HP] ..........357...........[/color]
[09:47:12] <%Gwi[XD]> ** (Gwd) Dragon`'s Steel Titan Punched 1 - 11 - 10 - 9 on Zaros [HP] ..........326...........

[color=red][09:47:15] <%Gwi[XD]> ** (Gwd) Neopets takes out his Dharoks axe and hits a  on Zaros [HP] ..........325...........[/color]
[color=red][09:47:18] <%Gwi[XD]> ** (Gwd) Neopets's Unicorn uses their ability to heal a 14 [HP] ..........14...........[/color]
[09:47:21] <%Gwi[XD]> ** (Gwd) Zaros unleashes his rage and hits a 35 on Neopets [HP] ...........0............

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 (09:46:19) <Gwi[UK]> ** (Gwd) Neopets [Wins: 1221 Losses: 296] is going to solo: Guthix
(09:46:19) <Gwi[UK]> ** (Gwd) Player 1 (Neopets) Gets the first turn
(09:46:20) <Gwi[UK]> ** (Gwd) You summoned the very powerfull Steel Titan
(09:47:37) <@Neopets> .dbow
 (09:47:38) <Gwi[UK]> ** (Gwd) Neopets shoots 2 dràgon arrows 39 - 42 with his Dark Bow on Guthix [HP] ..........174........... [25% Spec left]
(09:47:39) <Gwi[UK]> ** (Gwd) Guthix uses their special powers to slash a 32 on Neopets [HP] ...........0............
(09:47:39) <Gwi[UK]> ** (Gwd) Guthix Killed one of the players! Missed loot: [Guthix Hilt | Rune Scimitar | Rune Halberd] [50,4M]
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This isn't the first time this glitch has happened as well. I've heard SB may also cause this problem (i.e setting the HP var to 14/40 instead of increasing it) though haven't witnessed it personally.